“Hot n Cold” is a song performed by pop singer Katy Perry and the third single from her  album One of the Boys.The song “Hot n Cold” peaked at number 3 on the Hot 100 and was certified 4× platinum by the RIAA.

“Teenage Dream” performed by American singer and songwriter Katy Perry,the second single from her third studio album Teenage Dream. It was released in the United States on August 24, 2010.The song topped the charts in United States,Australia, Canada, Ireland, New Zealand, and the United kingdom.

“Firework”  is a song by American singer and songwriter Katy Perry.The song is being released as the album’s official third single from her third studio album Teenage Dream.